Spindle mounting



Patented Feb. 2, 1954 TElD' Si 'lTATES F 668,087

SPINDLE MOUNTING Dimitri G. Soussloffi- Warwick. Neck, Warwick;

and; Hans Wbr-mser, Providence, R; 1;, as:-

signors to Universal WindingzGompannQ-lranston, R- I a comorationof: Massachusetts Applicatibn AprilZS, 1951",.SeriaI'No. 222336 (Cl. 308-'--152f) 3 Claims; 1

This invention relates to a vibration isolating spindle mounting for a twisting" machine. More specifically; theinvention relatesto an improve ment in a vibration isolating spindlemounting fora twisting machine" which prevents the accumulation of staticelectricity which may affect the" handling characteristics of yarn being processed by the twisting machine.

upright, rotatably' supported spindle iscommonlyemployed as oneel'ement of atwisti'ng machine: A spindlethus-employed is driven at high speeds, and in the event the yarn package; or the core of the yarn package; carried by the spindle is not balanced about its axis of rotation" severe vibrations are set up inthe spindle mounting: Such vibrations limit the speed at which the twisting machine may be safely operated, and also cause undue" wear of the a'lTected' components" of the machine.

The transmission to-the spindle mounting of vibrations originating in this manner may bereduced to a large extent by elastically supporting thespin'dl'e' step inwhich" the spindle is journaled. This has been done efiectively by bonding to a mounting shell one face of rubber washers which on another face are bonded to' metal washers which engagin'gly support the spindle step. This type of an elastic support for a spindle stepis shown inthe accompanying drawing. elastic support oi this kind for the spindle step' and the spindle: electrically isolates these elements from the remainder of the twisting machine with which they may be associated, so that very substantial charges of static electricity are accumulated thereon as a; result of the generator-like efiect of" the spindle and yarn being rotated at high speed- Such an: accumulation of static electrid charges afiects the behavior of' the" yarn being processed by the twisting machine and often causes irregularities in the operation of the machine.

The purpose of this invention is to provide a vibration isolating spindle mounting which retains all the advantages of an elastically supported spindle step, and which at the same time is constructed and arranged to avoid the accumulation of static electricity which may affect the behavior of the yarn being processed.

One embodiment of the invention is illustrated in the accompanying drawing which shows a diametric vertical sectional view of a vibration damping spindle mounting, and in which drawing the spindle step and the lower portion of the whorl of a spindle supported thereon are shown in elevation.

Irrgeneral the invention consists'of." providin a compressible conducting meansbetweena spin:- dlestep and the elemention which it is elasticaily supported, and from which it'isthereby otherwise electrically isolated, so that the conductive means will bleed static electricity: from thespindie step while in: no manner interfering with the vibration isolating efiect of the elastic: su porte A full understanding of theinventionmay be had from: the following detailed description oi the embodiment of the invention: which is illustrated in: the accompanying drawing-l In: the drawing, a mounting element. or shell i i! extends into an aperture provided: in the member lit, which maybe a swing arm, and is supported therein by the radially: extending fianger I 2 err the upper edge of the shell; This flangerests upon the shoulder which is-forined in the: wall of the: aperture in: the member Hi. The shell: m is fixedly positioned with respect to the member H by the set screw" M which threadedly engages the member: H and: abuts the outer wall of the portion of; the. shell which ispositioned within the shell receiving aperture.

Ar spindle ste ii extends through: the shell t0 cuaozially therewith and is elastically mount.- ed therein by means which include the.- rubber rings l6 and. IT. The spindle step: t5 i's adapted at: its upper end to rotatably support aspindle (not shown), thelwhorli I 8 oi which: maybe seen in the drawing.

The: lower portion l s ot the shell I0 is reduced diameter to provide an internal shoulder 20 to which one face of rubber ring It is bonded". Similarly, the lower edge of the shell m is provided with a radially extending flange 2& to the underside. of which one face of the rubber ring I? is bonded. The spindle step I5 is supportably engaged by means which include the metal rings 22, 23 which at their inner circumference closely encircle the spindle step I5. The metal rings 22, 23 are bonded, respectively, to the rubber rings l6, IT. The spindle step comprises a radially extending collar 24 the underside of which rests upon the upper surface of the ring 22. A lower portion of the spindle step is threaded as at 25 to receive a tightening nut 26 which may be turned up into engagement with underside of the ring 23. The nut 26 may be taken u to bring the metal rings 22, 23 into firm frictional engagement with the collar 24 and the nut 26, respectively, so that, in effect, the spindle step [5 is rigidly connected to the rings 22, 23. The inner diameter of the lower portion [9 of the shell is sufficiently larger than the outside diameter of the spindle step to permit the spindle step to freely oscillate within the shell.

It will be understood that the rubber rings l6, I! will not exhibit the desired characteristic of isolating vibrations if in the course of establishing the frictional connection between the ring 22 and the collar 24, and between the ring 23 and the nut 26, respectively, the rubber rings are placed under heavy compression. In order to thus prevent compressing the rubber rings until they take on the characteristics of a solid material, the means for supportably engaging the spindle step includes a sleeve 28 which closely encircles the spindle step, and which at its ends abuts the most inwardly portions of the mutually facing surfaces or the rings 22, 23. With the sleeve 28 thus interposed between the rings 22, 23, the firm frictional engagement necessary to fasten the spindle step to the rings 22, 23 may be obtained without placing the rubber rings l6, l1 under compression. As a result, the spindle I1 floats more easily on the elastic support, and the maximum vibration isolating effects of the elastic support are obtained.

It will be observed that in the vibration isolating spindle mounting thus far described the spindle step [5, and the means for supportedly engaging the spindle step, are electrically isolated from the shell l by the rubber rings and, accordingly, from the remainder of the twisting machine with which the spindle mounting may be associated. This results in the accumulation of static electricity on the spindle and the sp ndle mounting, and adversely effects the behavior of yarn being processed in the twisting machine, as previously explained. This difliculty is obviated by the present invention by inserting in the space between the sleeve 28 and the lower portion 19 of the shell a mass of steel wool 30 which contacts the sleeve 28 and the shell portion [9 over a large area. The steel wool thus provides a path for the discharge of static electricity accumulating on the spindle or spindle step to the shell [9, without in any manner interfering with the oscillation of the spindle step on its: elastic support. It will be apparent that other kinds of shredded conductive material which is easily compressible may be substituted for the steel wool.

It is desired to secure by Letters Patent the claims of invention set forth below:

1. A vibration isolating spindle mountin comprising an annular shell having two spaced, parallel surfaces, two annular rubber rings bonded on one surface, respectively, one to each of said parallel surfaces, two annular members bonded,

respectively, one to each of another surface of each said rubber ring, a spindle step positioned to extend through the said shell, rubber rings and annular members, a spacing sleeve closely en- 4 circling a portion of said spindle step and abutting at its ends the mutually facing surfaces of said annular members, means supported on said spindle step for releasably securing said spindle step to the oppositely facing surfaces of said annular members, and compressible conductive means interposed between and contacting said spacing sleeve and said shell.

2. A vibration isolating spindle mounting comprising an annular shell having two spaced, parallel surfaces, two annular rubber rings bonded on one surface, respectively, one to each of said parallel surfaces, two annular members bonded, respectively, one to each of another surface of each said rubber ring, a spindle step positioned to extend through the said shell, rubber rings and annular members, a spacing sleeve closely encircling a portion of said spindle step and abutting at its ends the mutually facing surfaces of said annular members, means supported on said spindle stepfor releasably securing said spindle step to the oppositely facing surfaces of said annular members, and a compressible mass of shredded conductive material interposed between and contacting said spacing sleeve and said shell.

3. A vibration isolating mounting comprising an annular shell having two spaced, parallel surfaces, two annular rubber rings bonded on one surface, respectively, one to each of said parallel surfaces, two annular members bonded, respectively, one to each of another surface of each said rubber ring, a spacing sleeve extending through said shell and rubber rings and abuttin at its ends the mutually facing surfaces of said annular members, said spacing sleeve being adapted to encircle an object to be mounted, the oppositely facing surfaces of said annular members being engageable by means carried by said object for securing said object in the mounting, and compressible conductive means interposed between and contacting said spacing sleeve and said shell.

DIMI'IRI G. SOUSSLOFF. HANS H. WORMSER.

References Cited in the file of this patent UNITED STATES PATENTS FOREIGN PATENTS Country Date Great Britain 1914 Germany Jan. 26, 1904 Number Number 

